Your guide to the Solar System and the night sky
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Comets

Browse and discover detailed information about 191 of the most interesting comets. Comets are listed in order of decreasing brightness.

Visibility from selected location  = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet C/2018 O1 (ATLAS)

C/2018 O1 (ATLAS)
R.A: 09h 48m 31s   Dec: -09° 32’ 52”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 46.0 (JPL) 
in Sextans   current altitude less than 30 degrees above the horizon

Comet 55P/Tempel-Tuttle

55P/Tempel-Tuttle
R.A: 15h 17m 57s   Dec: -18° 08’ 04”
Observed Magnitude N.A. (COBS)
Estimated Magnitude 48.0 (JPL) 
in Libra   object currently below the horizon

Comet Great January Comet of 1910 (C/1910 A1)

C/1910 A1 (Great January Comet)
R.A: 20h 03m 05s   Dec: +06° 55’ 29”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Aquila   object currently below the horizon

Comet Skjellerup-Maristany (C/1927 X1)

C/1927 X1 (Skjellerup-Maristany)
R.A: 17h 04m 03s   Dec: -65° 46’ 50”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Ara   object currently below the horizon

Comet C/1956 R1 (Arend-Roland)

C/1956 R1 (Arend-Roland)
R.A: 04h 06m 04s   Dec: +69° 09’ 12”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Camelopardalis   current altitude greater than 30 degrees above the horizon

Comet C/1969 Y1 (Bennett)

C/1969 Y1 (Bennett)
R.A: 02h 33m 08s   Dec: +30° 13’ 00”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Aries   current altitude less than 30 degrees above the horizon

Comet West (C/1975 V1-A)

C/1975 V1-A (West)
R.A: 19h 35m 49s   Dec: -16° 17’ 19”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Sagittarius   object currently below the horizon

Eclipse comet (Comet C/1948 V1)

C/1948 V1 (Eclipse comet)
R.A: 08h 45m 03s   Dec: -05° 02’ 54”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Hydra   current altitude greater than 30 degrees above the horizon

Comet Ikeya-Seki (C/1965 S1)

C/1965 S1 (Ikeya-Seki)
R.A: 06h 48m 31s   Dec: -11° 40’ 32”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Canis Majoris   current altitude less than 30 degrees above the horizon

Comet C/2012 S1 (ISON)

C/2012 S1 (ISON)
R.A: 07h 31m 10s   Dec: +36° 46’ 18”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Lynx   current altitude greater than 30 degrees above the horizon

Southern Comet (C/1947 X1-A)

C/1947 X1-A (Southern Comet)
R.A: 21h 48m 58s   Dec: -04° 21’ 40”
Observed Magnitude N.A. (COBS)
Estimated Magnitude N.A. (JPL) 
in Aquarius   object currently below the horizon
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